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                [Poi2003]Chocolate                 </h1>
                <p>时间限制：5s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><p class="MsoNormal" style="text-indent: 24pt"><span class="Apple-style-span" style="font-size: medium"><br />
</span><br clear="all" style="mso-ignore: vglayout" />
<span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">有一块</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">n*m</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的矩形巧克力，准备将它切成</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">n*m</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">块。巧克力上共有</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">n-1</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">条横线和</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">m-1</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">条竖线，你每次可以沿着其中的一条横线或竖线将巧克力切开，无论切割的长短，沿着每条横线切一次的代价依次为</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">y<sub>1</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">y<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，&hellip;，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">y<sub>n-1</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，而沿竖线切割的代价依次为</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">x<sub>1</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">x<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，&hellip;，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">x<sub>m-1</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。例如，对于下图</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">6*4</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的巧克力，</span></p>
<p class="MsoNormal" style="text-indent: 24pt"><img alt="" src="../file/2430_0.jpg" /></p>
<p class="MsoNormal" style="text-indent: 24pt"><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">我们先沿着三条横线切割，需要</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">3</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">刀，得到</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">4</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">条巧克力，然后再将这</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">4</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">条巧克力沿竖线切割，每条都需要</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">5</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">刀，则最终所花费的代价为</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">y<sub>1</sub>+y<sub>2</sub>+y<sub>3</sub>+4*(x<sub>1</sub>+x<sub>2</sub>+x<sub>3</sub>+x<sub>4</sub>+x<sub>5</sub>)</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent: 24pt"><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">当然，上述简单切法不见得是最优切法，那么怎样切割该块巧克力，花费的代价最少呢？</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt"><o:p></o:p></span></p>
<p></p></p><hr/><h3>输入格式</h3><p><p class="MsoNormal" style="text-indent: 24pt"><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第一行为两个整数</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">n</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">m</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent: 24pt"><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">接下来</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">n-1</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">行，每行一个整数，分别代表</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">x<sub>1</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">x<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，&hellip;，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">x<sub>n-1</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent: 24pt"><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">接下来</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">m-1</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">行，每行一个整数，分别代表</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">y<sub>1</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">y<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，&hellip;，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">y<sub>m-1</sub></span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt"><o:p></o:p></span></p>
<p></p></p><hr/><h3>输出格式</h3><p><p><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">输出一整数，为切割巧克力的最小代价。</span></p>
<p></p></p><hr/><h3>样例输入</h3><pre>6 4
2
1
3
1
4
4
1
2
</pre><hr/><h3>样例输出</h3><pre>42</pre><hr/><h3>提示</h3><p><p class="MsoNormal" style="margin-left: 21pt; mso-para-margin-left: 2.0gd; tab-stops: 108.0pt"><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">30%</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的数据，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">n&lt;=100,m&lt;=100<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left: 21pt; mso-para-margin-left: 2.0gd"><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">100%</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的数据，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">n&lt;=10000</span><span style="font-size: 12pt; font-family: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US" style="font-size: 12pt; mso-bidi-font-size: 10.0pt">m&lt;=10000<o:p></o:p></span></p>
<p class="MsoNormal" align="center" style="text-align: center"><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="font-size: 18pt; color: red; mso-bidi-font-size: 10.0pt"><o:p>&nbsp;</o:p></span></b></p>
<p></p></p><hr/><h3>题目来源</h3><p>Day1</p>
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